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Normal operation L1 L2 L3 N K1 K2 SIEMENS φ-> cos φ = PF Ires-> Active current onDEL-> Current on delay Mem ?-> Memory? NC -> Circuit principle 5,0A Lx Ly/NIN ~ 90-690V 22 2124 12 1114 Ires 05101520253035404550556065707580 M [Nm] 0 0,2 0,4 0,6 0,8 1,0 cos I [A] 5 10 15 20 0 25 nominal load I res OK L2L1L3 M ▼M ▲
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Normal operation L1 L2 L3 N K1 K2 SIEMENS φ-> cos φ = PF Ires-> Active current onDEL-> Current on delay Mem ?-> Memory? NC -> Circuit principle 0,86 Lx Ly/NIN ~ 90-690V 22 2124 12 1114 cosφ 05101520253035404550556065707580 M [Nm] 0 0,2 0,4 0,6 0,8 1,0 cos I [A] 5 10 15 20 0 25 nominal load I res OK L2L1L3 M ▼M ▲
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Underload, e.g. broken belt L1 L2 L3 N K1 K2 SIEMENS φ-> cos φ = PF Ires-> Active current onDEL-> Current on delay Mem ?-> Memory? NC -> Circuit principle cosφ Lx Ly/NIN ~ 90-690V 22 2124 12 1114 05101520253035404550556065707580 M [Nm] 0 0,2 0,4 0,6 0,8 1,0 cos I [A] 5 10 15 20 0 25 underload I res OK L2L1L3 M ▼M ▲
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Overload, e.g. blockage L1 L2 L3 N K1 K2 SIEMENS φ-> cos φ = PF Ires-> Active current onDEL-> Current on delay Mem ?-> Memory? NC -> Circuit principle Lx Ly/NIN ~ 90-690V 22 2124 12 1114 Ires 05101520253035404550556065707580 M [Nm] 0 0,2 0,4 0,6 0,8 1,0 cos I [A] 5 10 15 20 0 25 overload I res OK L2L1L3 M ▼M ▲
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Cable break L1 L2 L3 N K1K2 SIEMENS φ-> cos φ = PF Ires-> Active current onDEL-> Current on delay Mem ?-> Memory? NC -> Circuit principle Lx Ly/NIN ~ 90-690V 22 2124 12 1114 current in remaining cables rises to keep up the torque Ires K1K2 OK L2L1L3 M ▼M ▲
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Phase failure of L1 L2 L3 N K1 K2 SIEMENS φ-> cos φ = PF Ires-> Active current onDEL-> Current on delay Mem ?-> Memory? NC -> Circuit principle Lx Ly/NIN ~ 90-690V 22 2124 12 1114 Loss of supply voltage OK L2L1L3 M ▼M ▲
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Phase failure of L2 L1 L3 N K1K2 K1K2 SIEMENS φ-> cos φ = PF Ires-> Active current onDEL-> Current on delay Mem ?-> Memory? NC -> Circuit principle Lx Ly/NIN ~ 90-690V 22 2124 12 1114 cosφ Phase shift of approx. +30° => cos φ rises OK L2L1L3 M ▼M ▲
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Phase failure of L3 L1 L2 N K1K2 K1K2 SIEMENS φ-> cos φ = PF Ires-> Active current onDEL-> Current on delay Mem ?-> Memory? NC -> Circuit principle Lx Ly/NIN ~ 90-690V 22 2124 12 1114 cosφ Phase shift of approx. -30° => cos φ falls OK L2L1L3 M ▼M ▲
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Phase sequence L1 L3 L2 N K1K2 K1K2 SIEMENS φ-> cos φ = PF Ires-> Active current onDEL-> Current on delay Mem ?-> Memory? NC -> Circuit principle Lx Ly/NIN ~ 90-690V 22 2124 12 1114 cosφ cos φ becomes (1 - cos φ) OK L2L1L3 M ▼M ▲
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